In the study, over 300 heterosexual participants between the ages of 18 and 30 were asked about their experiences with people of the opposite sex. Questions included things like, "Have you ever been friendly to a person of the opposite gender, and had your actions interpreted as sexual interest? If yes, how many times has this happened?" and "Have you ever been sexually attracted to someone and shown interest, and had the other person misinterpret your signals as friendliness? If yes, how many times has this happened?"

They found that, while both women and men had experienced both phenomenon, women were far more likely to have had friendly actions misinterpreted as sexual interest, and men far more likely to have their efforts to express sexual interest interpreted as the behavior of a friend. These results were consistent with a similar American study done in 2003, suggesting that this truly is a pervasive pattern in our society, not just a stereotype.

So why are we like this? Well, the researchers think it might be part of our evolutionary biology, especially since the results remain consistent in two different countries — especially since Norway is ranked as one of the most gender equal countries in the world, unlike the United States. Still, study author Mons Bendixen says that even though men might be evolutionarily primed to err on the side of optimism when it comes to seeking opportunities for sex, that doesn't by any means excuse the behavior of men who try to pressure or guilt trip women, or who won't take no for an answer when their mistake is pointed out.

“Even though evolutionary psychology and our findings can help account for some sexually inappropriate behaviour in men, it doesn’t mean that evolutionary psychologists defend this happening," Bendixen said. "Measures can be taken to prevent sexual harassment. It will help if we just teach men that a woman who laughs at your jokes, stands close, or touches your arm at a party doesn’t mean that she’s sexually interested, even if you think she is."

So guys, if you think a woman is interested in you and it turns out you got it wrong, just know that it's OK, it happens. What isn't OK though, is if you try to insist that she really is into you, or that she's a tease, or anything else that isn't a polite, "Oh, I'm sorry. My bad." Don't be that guy, OK? Just don't.